I am on machine A, hopping onto machine B to finally reach machine C.
A --ssh--> B --ssh--> C
When I ssh-add my private key on A, all works fine and I can hop onto B as many times as I want without supplying any passwords.
When I ssh-add on B, I get this error message:
Could not open a connection to your authentication agent.
The objective is to ssh-add on B too and from there to reach many different C's...
I know how to set up "pass-through" using .ssh/config but that's not what I am trying to do.